Which sum or difference identity could be used to prove that cos(270º - thata) = -sin thata is an identity?
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Answer:
Step-by-step explanation:
Given the slope and another point, simply plug them into the point-slope formula to find your y-intercept.
Now that we've found your y-intercept, we have the original equation. To find the perpendicular equation, you need the opposite reciprocal of your slope.
To find the 'opposite,' change your slope's sign. Since your slope is positive , the opposite is
.
To find the 'reciprocal,' flip your fraction. This will make your slope .
Your final equation is: